package com.example.springdemo;



import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;

public class tetsinterger {
    public static void main(String[] args) {


        System.out.println(test());



    }


    public static boolean test(){
        try{
            HashMap hashMap = null;
            hashMap.get("2222");
            return true;
        }catch (Exception e){
            e.printStackTrace();
        }
        return false;
    }

}
